NAME
    Tie::RegexpHash - Use regular expressions as hash keys

REQUIREMENTS
    "Tie::RegexpHash" is written for and tested on Perl 5.6.0, but should
    run with Perl 5.005. (Because it uses Regexp variables it cannot run on
    earlier versions of Perl.)

    It uses only standard modules.

  Installation

    Installation is pretty standard:

      perl Makefile.PL
      make
      make test
      make install

HISTORY

Changes since v0.10

  0.12  22 Nov 2002
	- fixed bug with logic in _find() routine

  0.11  27 Jan 2001
	- added SEE ALSO in POD about Tie::Hash::Regex
	- should run on Perl 5.005
	- no longer an Exporter
	- added stub for test suite

SYNOPSIS
      use Tie::RegexpHash;

      my %hash;

      tie %hash, 'Tie::RegexpHash';

      $hash{ qr/^5(\s+|-)?gal(\.|lons?)?/i } = '5-GAL';

      $hash{'5 gal'};     # returns "5-GAL"
      $hash{'5GAL'};      # returns "5-GAL"
      $hash{'5  gallon'}; # also returns "5-GAL"

      my $rehash = Tie::RegexpHash->new();

      $rehash->add( qr/\d+(\.\d+)?/, "contains a number" );
      $rehash->add( qr/s$/,          "ends with an \`s\'" );

      $rehash->match( "foo 123" );  # returns "contains a number"
      $rehash->match( "examples" ); # returns "ends with an `s'"

DESCRIPTION
    This module allows one to use regular expressions for hash keys, so that
    values can be associated with anything that matches the key.

    Hashes can be operated on using the standard tied hash interface in
    Perl, or using an object-orineted interface described below.

    A more detailed description can be found in the POD

AUTHOR
    Robert Rothenberg <rrwo@cpan.org>

  Acknowledgements

    Simon Hanmer <sch@scubaplus.co.uk> & Bart Vetters <robartes@nirya.eb>
    for pointing out a bug in the logic of the _find() routine in v0.10.

SEE ALSO
    "Tie::Hash::Regex" is a module with a complimentary function. Rather
    than a hash with Regexps as keys that match a fetch, this module has
    standard keys but uses Regexps for fetches.

LICENSE
    Copyright (c) 2001-2002 Robert Rothenberg. All rights reserved. This
    program is free software; you can redistribute it and/or modify it under
    the same terms as Perl itself.